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From: Ryan Cumming <ryan@completely.kicks-ass.org>
To: chrisl@gnuchina.org, "Theodore Ts'o" <tytso@mit.edu>,
       Andreas Dilger <adilger@clusterfs.com>, linux-kernel@vger.kernel.org,
       ext2-devel@lists.sourceforge.net
Subject: Re: [PATCH] fix htree dir corrupt after fsck -fD
Date: Sun, 29 Sep 2002 19:46:57 -0700
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On September 29, 2002 01:16, Ryan Cumming wrote:
> Case 1:
> "Problem in HTREE directory inode 2 (/): bad block 3223649"
>
> Case 2:
> "Inode 2, i_blocks is 3718, should be 2280
> Directory inode 2 has an unallocated block #377
> Directory inode 2 has an unallocated block #378
> Directory inode 2 has an unallocated block #379"
> etc

Okay, a few more datapoints:
1) Case #1 happens much more frequently than case #2
2) I can trigger filesystem corruption with nothing but non-concurrent 
readdir()s and unlink()s
3) Although my initial tests were reaching the filesystem's inode limit, I've 
been able to reproduce case #1 with 153,129 free inodes and 217,294 free 
blocks.
4) Case #1 persists with Chris' stack overflow fix, modified to use memmove 
instead of memcpy
5) I have not been able to reproduce either error without the dir_index flag 
set. This may be due to the fact that my test program runs -much- more slowly 
without directory indexing.

- -Ryan
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